Finding the Fourth Proportional to 12,740.49, 17,585.51 and 7,438.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,740.49 : 17,585.51 = 7,438.23 : x
2. Step 2: Convert to fraction form
   12,740.49/17,585.51 = 7,438.23/x
3. Step 3: Cross multiply
   12,740.49x = 17,585.51 × 7,438.23
4. Step 4: Simplify right side
   12,740.49x = 130,805,030.86
5. Step 5: Solve for x
   x = 130,805,030.86/12,740.49
6. Step 6: Final answer
   x = 10,266.88